mirror of
https://github.com/hanzoai/pubsub-go.git
synced 2026-10-30 18:23:30 +00:00
zeekay
c694475676
- Update module path from github.com/nats-io/nats.go to github.com/hanzoai/pubsub-go - Update all internal imports to use new module path - Maintain upstream remote for future sync
97 lines
2.3 KiB
Go
97 lines
2.3 KiB
Go
// Copyright 2012-2022 The NATS Authors
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package main
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import (
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"flag"
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"log"
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"os"
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"time"
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"github.com/hanzoai/pubsub-go"
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)
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// NOTE: Can test with demo servers.
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// nats-req -s demo.nats.io <subject> <msg>
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func usage() {
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log.Printf("Usage: nats-req [-s server] [-creds file] [-nkey file] <subject> <msg>\n")
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flag.PrintDefaults()
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}
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func showUsageAndExit(exitcode int) {
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usage()
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os.Exit(exitcode)
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}
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func main() {
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var urls = flag.String("s", nats.DefaultURL, "The nats server URLs (separated by comma)")
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var userCreds = flag.String("creds", "", "User Credentials File")
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var nkeyFile = flag.String("nkey", "", "NKey Seed File")
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var showHelp = flag.Bool("h", false, "Show help message")
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log.SetFlags(0)
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flag.Usage = usage
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flag.Parse()
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if *showHelp {
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showUsageAndExit(0)
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}
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args := flag.Args()
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if len(args) < 2 {
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showUsageAndExit(1)
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}
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// Connect Options.
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opts := []nats.Option{nats.Name("NATS Sample Requestor")}
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if *userCreds != "" && *nkeyFile != "" {
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log.Fatal("specify -seed or -creds")
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}
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// Use UserCredentials
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if *userCreds != "" {
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opts = append(opts, nats.UserCredentials(*userCreds))
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}
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// Use Nkey authentication.
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if *nkeyFile != "" {
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opt, err := nats.NkeyOptionFromSeed(*nkeyFile)
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if err != nil {
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log.Fatal(err)
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}
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opts = append(opts, opt)
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}
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// Connect to NATS
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nc, err := nats.Connect(*urls, opts...)
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if err != nil {
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log.Fatal(err)
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}
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defer nc.Close()
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subj, payload := args[0], []byte(args[1])
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msg, err := nc.Request(subj, payload, 2*time.Second)
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if err != nil {
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if nc.LastError() != nil {
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log.Fatalf("%v for request", nc.LastError())
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}
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log.Fatalf("%v for request", err)
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}
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log.Printf("Published [%s] : '%s'", subj, payload)
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log.Printf("Received [%v] : '%s'", msg.Subject, string(msg.Data))
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}
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